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arXiv 1701.07008hep-ph
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在LHC具有自旋2介质的简化暗物质模型

Simplified dark matter models with a spin-2 mediator at the LHC

Sabine Kraml, Ursula Laa, Kentarou Mawatari, Kimiko Yamashita

摘要:

我们考虑简化的暗物质模型,其中一个暗物质候选人耦合到标准模型(SM)粒子通过$s$通道自旋-2调解人,并研究从目前的大型强子对撞机数据的模型参数空间的约束。我们的重点在于不同的搜索之间的互补性,特别是单喷流和多喷流加上丢失的能量搜索和共振搜索。对于介质与SM粒子的普遍耦合,丢失能量搜索可以给出比$WW$、$ZZ$、dijet、dihiggs、$t\bar t$、$b\bar b$共振搜索更强的约束,在低质量区域和/或当介质与暗物质的耦合比其与SM粒子的耦合大得多时。然而,最强的约束来自双光子和双轻子共振搜索。只有当这些模式被抑制时,丢失能量搜索才能在用自旋2介质约束暗物质模型中具有竞争力。

英文摘要:

We consider simplified dark matter models where a dark matter candidate couples to the standard model (SM) particles via an $s$-channel spin-2 mediator, and study constraints on the model parameter space from the current LHC data. Our focus lies on the complementarity among different searches, in particular monojet and multijet plus missing energy searches and resonance searches. For universal couplings of the mediator to SM particles, missing-energy searches can give stronger constraints than $WW$, $ZZ$, dijet, dihiggs, $t\bar t$, $b\bar b$ resonance searches in the low-mass region and/or when the coupling of the mediator to dark matter is much larger than its couplings to SM particles. The strongest constraints however come from diphoton and dilepton resonance searches. Only if these modes are suppressed, missing-energy searches can be competitive in constraining dark matter models with a spin-2 mediator.

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